Safety device for fuses for projectiles



K. WIE-SER. SAFETY DEVICE FOR FU SES FOR PROJECTILES.

APPLICATKON HLED SEPT- 3, 1920- Patented Mar. 22, 1921.

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ITD STATES fA T o IcE.

KARL WIESER, or WERDEN, GERMANY, ASSIGNOR'TO EEIED. KEUPP AKTIEN GESELLSGEAFT, on EssEN-ON-TH -EUH GERMANY.

SAFETY nnvrcE Eon EusEs FOR rEoJEomLEs.

To all whom it may concern:

Be it known that I, KARL WIESER, residing at Werden, Ruhr, Germany, a citizen of the German Republic, have invented a certain new and useful Improvement in Safety Devices for Fuses for Projectiles, of which the following is a specification.

This invention relates to a safety device for fuses for projectiles. The object of the invention consists in the prevention of premature explosion by means of a packing disk inserted in the ignition passage of the fuse during transport and capable of being thrown out of operation when required. According to the invention the packing disk is so disposed that the jet of flame resulting from premature ignition will bring about a bulging of the disk in the ignition passage and effect the required packing action which in comparison with known safety devices has the advantage that a gas-tight packing is secured in a simple way.

The invention will be furthendescribed with reference to the accompanying drawmovement toward ings which show as an example a percussion fuse with a packing disk according to the invention applied thereto and in which f Figure 1 is a longitudinal section of the use,

Fig. 2 is a sectional plan on the line 22 of Fig. 1,

Fig. 3 is a side elevation, partially in section similar to Fig. 1, of the fuse after a premature ignition of the detonator has taken place, and

Fig. 4: shows on a larger scale a side elevation, partly in section, taken approximately at right angles to the section shown in Fig. 1.

A denotes the body of the fuse, a the firing pin, B the striker which carries the detonator and C is the bursting charge. The striker is prevented from premature the firing pin a by a centrifugal force From the detonator of the formed by three interb a a leads to the bursting charge C. Between the passages a and a is inserted an irregularly shaped disk E which is pivotally mounted in the body of the fuse, in such a way, that when the fuse is in the transport state this disk completely covers the passage a The appawell known way safety device D.

striker B, a passage connected passages ratus is at the same time so constructed that in the the disk is able to swing outward under the action of centrifugal force in the direction of the arrow 00 (see Fig. 2) and expose the passage a When the fuse is in the transport state the disk E is prevented. from swinging outward in the direction of the arrow 00 by a pin the gun is fired can fly back and thereby moveout of the path of the disk E (see Fig. 4;). To prevent the disk E from swinging outward in the opposite directionto that indicated by the arrow 00, which might happen when the gun was fired, under the action of inertia, a fixed pin a is provided which bears against the disk E (see Fig. 2). The thickness of the disk E and its material are so selected that when ignition of the detonator 6? takes place before the disk E has swung outward the jet of flame resulting from such ignition causes a bulging of the disk E into the ignition passage so that, as shown in Fig. 3, the passagea is closed up perfectly tight and the jet of flame cannot consequently reach the bursting charge C. I

Since disk E is pressed against the part of F (see Fig. 2), which when- Specification of Letters Patent. Patented Mar. 22, 1921, T Application filed September 3, 1920. -Seria1 No. 408,094. r

the igniter body surrounding the passage a V with great force, movement of the projectile,

by the axial forces of inertla, and furthermore, the forces 7 of inertia produced by the rotary acceleraat the beginning of thetion of the projectile tend to turn the disk has normally covering said ignition passage,

means for mounting said disk to enable it to be thrown out of operation transversely to the direction of theignition passage, said packing disk being deformable by the jet of ,flame'resulting from the ignition of the percussion pellet to thereby bulge the disk into the ign tion passage.

2. A fuse for pro ectiles which comprises a striker, a percussion pellet, an ignition g; M if '7 I p w 1372,5 82

passage, thin disk deformable by the jet transi ersely to the direction of the ignition of fiznne resultingfrom the ignition'of the passage. 10 percussion pellet disposed across the igni- The foregoing specification signed' at tion passage, means 'pivotally supporting" Essen Germany, this 19th day of June, 1920. said disk at one edge thereof displaceable r V KARL WIES'ER. means for retaining the disk in its operative In presence of position, said disk being so mounted as to V HANS GoTTsMANN,

enable it to be thrown out of operation Jose] OLBERTZ, 

